I have a cat that I'm watching for someone for a week and I also have a cat of my own. The cats didn't exactly "hit it off" so I took my cat to my parents place for the time being. The cat that I'm watching hasn't eaten and drank water for about 32 hours now since I've had him with me. He has gone to the bathroom twice but thats it. Ive tried treats, tuna, canned food and none of its working. I'm going to try milk next. Any other advice?